最新刊期
卷 27 ， 期 3 ， 2014
- 摘要：The supramolecular dendritic polymers (supramolecular dendrimers) originate from two evolutionary changes in polymer chain structure with combining concepts of dendritic chain and supramolecules. Therefore, supramolecular dendrimers have novel structure and unique properties. Supramolecular dendrimers are usually self-assemblied via non- covalent interactions with building blocks,so called core, branching units and peripheral functional groups. And the higher ordered structure like liquid crystal phases or hexagonal columns are formed by further self-organization of the supramolecular dendrimer chains. Herein,supramolecular dendrimers can be roughly classified into several types: hydrogen-bonded, metal-coordinated, π-π stacked, ionic-bonded, topological, and hybrid with two above types. This tutorial review briefly summarizes the synthesis,structure and aggregation of the emerging supramolecular dendrimers, as well as their application prospects.关键词：Dendritic polymers;Supramolecular dendrimers;Molecular self-assembly;Self-organization
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发布时间：2022-09-18 - 摘要：The Diels-Alder (DA) reaction is a [4 + 2] cycloaddition between diene and dienophile. Recently, the self- healing polymer materials with reversible property based on DA reaction have been applied in shape memory polymers, reworkable coating, drug transport and electronic packaging. The compound or oligomer with furan group was used as a diene,and the maleimide was used as dienophile in the DA reaction. Other diene-dienophile pairs,such as anthracene- maleimide and cyclopentadiene-dicyclopentadiene, have also been utilized for the development of self-healing materials. According to the different structures of diene and dienophile, this review tries to introduce the progress of self-healing polymer based on DA reaction and discuss the application and latent development direction.关键词：Diels-Alder;Self-healing;Polymer materials
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发布时间：2022-09-18 - 摘要：This paper discusses the methods and the research progress of producing 5-hydroxymethylfurfural (5-HMF) from renewable biomass resources. 5-HMF as an important platform chemical compound can be converted into many kinds of reactive polymer monomers, such as levulinic acid, 2, 5-furandicarboxylic acid,furan resin precursor to be used for synthesis of polyester, surface active agents,coating materials and synthetic perfume. This paper focuses on the preparation methods of 5-HMF in laboratory and the existing problems. In comparison with advantages and disadvantages of the preparation methods in single-phase, doubt phases and other system, the influence of the conditions related to the yield and selectivity of 5-HMF is discussed. The future prospect for the industrialization of 5-HMF is also forecasted.关键词：5-hydroxymethylfurfural;Platform chemical compound;Biphasic reaction;Single-phase reaction
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发布时间：2022-09-18 - 摘要：As a new kind of composite adsorption material, the hyper-cross-linked polymeric adsorbent modified with functional group is reported to exhibit a great variety of useful properties such as high specific surface area, rigid frame, good hydrophilicity, high mechanical strength, adjustable aperture structure and good adsorption selectivity and easy reproducibility, and has been applied in several fields in recent years. This paper reviews the development of the functional group modified hyper-cross-linked resin, including synthesis methods, adsorption mechanisms and application in wastewater treatment,chemical analysis and drug purification. Finally,some suggestion and the perspective of the hyper-cross-linked polymer with functional group are also presented.关键词：Hyper-cross-linked resin;Functional group;Preparation;Application;Adsorption
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发布时间：2022-09-18 - 摘要：Raman spectroscopy provides information about molecular vibrations,which are sensitive to interactions and conformations of the molecules. It enables the physicochemical features of polymers to be examined without resorting to chemical labeling and affords minimum sample preparation. Moreover, its spatial resolution can be better than 1 μm the lateral plane by focusing laser beams on the samples. Therefore,the construction unit, steric configuration, crystalline structure and conformational structure of the polymer chain can be studied by the Raman spectroscopy. Such as the Surface- enhanced Raman Scattering (SERS), Variable temperature Raman spectroscopy, Confocal Raman Microscopy (CRM), Raman Mapping and Resonance Raman scattering (RRS) are widely used in physics,chemistry and biomedicine. In this review,we summarize the research progresses of chain conformation, crystalline behave, chain diffusion and phase structure of polymer based on Raman technique, and deeply attempt to explore the applications of Raman spectroscopy in the polymer.关键词：Raman spectroscopy;Conformation;Crystalline behave;Chain diffusion;Phase structure.
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发布时间：2022-09-18 - 摘要：Due to the good processability and ability in large area production, the light-emitting polymers have shown great potential in the application of flat displays and solid-state lighting in recent years. Compared with red and green light- emitting polymers, the blue polymers have poorer electroluminescence property and stability, which becomes the bottleneck of the full color displays. Through introducing bulky side chains or substitute groups, and forming three-dimensional branched structure or host-guest structure with energy transfer, the solubility and photophysical properties are improved in order to get blue fluorescent polymers with high luminescence efficiency, good color purity, thermostability and good processability. In this article,the main progress of the blue light-emitting polymers was briefly reviewed from the point of the materials design.关键词：Fluorescence;PLED;Blue Fluorescent Materials;Polyfluorene;Organic Electroluminescence
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发布时间：2022-09-18 - 摘要：One of the major aims in emulsion polymerization over the past two decades has been the ability to increase the solid content and the performance of emulsion products. A variety of emulsifiers can be used in emulsion polymerization, emulsifier also can not be used, but the latex particle surface must be hydrophilic that is to say surfactant. Therefore, the principles and techniques of emulsion can actually be attributed to the surface of the latex particles possess hydrophily namely surfactant technology. Various studies have shown that the performance of latex prepared by different emulsifiers and surfactants varies widely. Using effective surfactant technologies not only greatly improve the performance of the polymer emulsion, but also shorten the reaction time and simplify preparation process. It is reviewed that conventional emulsifier, polymerizable emulsifier, compound emulsifier, surfmer and the surfactant technology in the high solid content emulsion polymerization. Also,some prospect was given.关键词：High-solid-content;Surfactant technology;Conventional emulsifier;Polymerizable emulsifier;Compound emulsifier;Surfmer
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发布时间：2022-09-18 - 摘要：Electrochromic materials have been attached widespread attention due to their potential applications such as display, smart windows and military camouflag, etc. In this paper, the electrochromic mechanism of polythiophene and its derivatives is introduced. The electrochromic properties, research progress and its application of polythiophene, D-A material,D-A-D material, thiophene copolymer and organic/inorganic nanocomposite materials are reviewed. It is believed that the D-A/D-A-D material, thiophene copolymer and organic/ inorganic nanocomposite materials with multicolors, good stability and film forming properties, easy processing, good conductivity properties should be the mainly development direction.关键词：Organic electrochromic material;Polythiophene derivatives;Polyethylene dioxy-thiophene;Donor-accetor;Nanocomposite.
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发布时间：2022-09-18 - 摘要：Nano-SiO2 is widely used as nano-fillers due to its odorless,nontoxic, nonpolluting and other characteristics. The applications of nano-SiO2 particles are restricted for their easily aggregation properties. But nano-SiO2 surfaces contain rich silanol groups,it can be modified. The physical and chemical surface modifications are two main methods in many methods for nano-SiO2 surface modification. Polymer modification is better method in chemical surface modification. Chemical modifications of nano-SiO2 surface by hydrophilic, hydrophobic, and amphiphilic polymers at home and abroad have been reviewed, their applications have been analyzed, and their promising development has been predicted.关键词：Nano-SiO2;Surface modification;Polymer
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发布时间：2022-09-18 - 摘要：Rubber and plastic mold design is a practical and important specialized course for polymer materials specialty. In this paper, for the purpose of improving the teaching quality and training students practical and innovative ability, cultivating high-quality academic talent, a series of reforms have been done in teaching content, teaching methods, practical teaching and assessment based on the current teaching problems of rubber and plastic mold design course, and the effect of the reforms has also been discussed.关键词：Mold design;Rubber;Plastics;Teaching reform
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发布时间：2022-09-18 - 摘要：In accordance with the fostering of chemical engineering practical ability, this paper, taking curriculum construction of Chemical Process Technology as its starting point, has made some theoretical and practical exploration in the reforms concerning teaching contents, textbook constructions, teaching modes and pedagogical methodologies, teachers, as well as evaluation contents and means, etc. And some achievements have been made as follows: A general higher education " twelfth five-year-plan" textbook, Chemical Process Technology, has been compiled and published, highlighting engineering characteristics and practical ability cultivation, in which a teaching method of "three types of cases combination" incorporating progressiveness,innovation and practicality has been invented and implemented. Besides, a novel teaching mode focusing on fortifying chemical engineering practical ability cultivation has been explored and practiced, which consolidates theoretical teaching,graduate internship, and chemical engineering simulated practical training.关键词：Engineering practice ability;Chemical Technology;Academy and industry collaboration;Teaching model;Teaching methodology
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发布时间：2022-09-18
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